|
|
| DEPTH CHARGES MARK 6 and MARK 7 |
| PART I |
| CHAPTER II - PARTS |
| MARK 6 MOD. 1 BOOSTER EXTENDERS |
|
|
|
44. The Mk 6 Mod. 1 booster-extender differs from the Mk 6 in that it has a packing ring a locking ring, and a raised lip on the spindle bushing, and a gasket between the bushing and the booster carrying flange. The packing ring and the gasket are designed to pre-vent moisture from entering the mechanism prior to use and causing corrosion which might result in faulty operation. The lip on the bushing is designed to raise the shank of the safety fork slightly when it is installed or removed, thus moving the spindle along its own axis and freeing it if it is stuck ot the packing ring or other parts of the mechansim. |
|
|
|
Blue indicates exterior - Red indicates interior |
|
45. The Mk. 6 booster contains approximately 3.52 pounds of granular TNT. The booster can is made up of four parts: |
|
the can itself |
|
the detonator envelope |
|
the head |
|
and the socket (which fits the flanged collar on the booster-extender). All parts of this can are made of brass except the detonator envelope which is copper. |
|
|
|
After the can is loaded, the head is locked in place by four lugs which engage slots in the can. The joint between the can and head is then secured with low-melting-point sol-der. |
|
42. The Mark 5 Mod. 1 booster is identical with the Mark 6 booster except that steel has been used as a substitute for brass material. The can is painted with a projective cavity paint on interior surfaces and zinc chromate primer on exterior surfaces. |
|
|
|
Blue indicates exterior - Red indicates interior |
|
48. The Mark 6 Mod. 2 booster can is designed for production by commercial can manu-facturers. After loading it is sealed by a standard can closing machine. The Mark 6 Mod. 2 booster contains approximately 3.12 pounds of granular TNT. In other respects the Mark 6 Mod. 2 booster is the same as the Mark 6 booster. |
|
49. The Mk. 1 Mod. 1 percussion detonator provided for use in these depth charges are of the instantaneous type. Each detonator contains 65 grains of fulminate of mercury. |
 |
